Paper valve bag and method of making the same



April 1932- J. c. REDINGTON 1,852,026

PAPER VALVE BAG AND METHOD OF MAKING THE SAME Filed Jan. 28, 1929 Jo/mC. Redz'nylon Patented Apr. 5, 1932 PATENT OFFICE 10m 'BEDDTGTON, OFGENEVA, ILLINOIS,

ASSIG'NOB, BY HESNE ASSIGNMENTS, TO

ST. BEG-IS PAPER COMPANY, OF NEW YORK, N, Y., A. CORPORATION OF NEW YOBKPAPER, VALVE BAG AND METHOD OF S m Application filed January 28, 1929.Serial No. 885,546.

This invention relates to paper valve bags. More particularly, itrelates to a bag having a valve and a sleeve within the valve which isutilized to strengthen the valved corner of the bag, and the oute end ofwhich may be closed for more securely sealing the bag after filling.

Valve bags and the filling of bags through a valve opening is wellknown, but for many materials the valves in common use do not closetightly enough to give entire satisfaction.

This invention has as its main object the provision of a bag and amethod of forming the same which will have a flat pasted end and a valvewhich can be completely closed after filling with only a minor closingoperation, thereby extending the major portion of the advantages ofvalve bags to a much wider range of materials.

In filling valve bags it is customary to sustain the valved corner ofthe bag upon a filling tube during the filling operation, and thiscorner of the bag is thereby subjected to a considerable strain. Oneadvantage of the present invention is that it enables the reinforcementof the valved corner of the bag.

Other objects and further details of the,

invention will appear as the description prob ceeds.

In the accompanying drawings forming a part of this specification. Fig.1 indicates the end of a bag which is to be closed by a pasted endclosure; Fig. 2 illustrates a sleeve-form- 5' ing sheet adapted for usewith such a bag as indicated in Fig. 1; Fig. 3 shows the sleeveformingsheet attached to the bag blank shown in Fig. 1; Fig. 4 indicates theend of the bag with'the sheet attached thereto and opened up for formingthe pasted endclosure; Fig. 5 shows the end of the completed bag.

The invention will be described as applied to a bag made from a papertube. It will be 5 readily understood that in practice the tubes will beformed of a plurality of plies of paper, as a usual thing, but forpurposes of illustrati'on only one thickness of bag wall is shown.

Inthe embodiment of the invention illusio trated in the drawings, abag-forming tube 14. corner of the bag, as shown in Fig. 3, so that isprovided with slits 11 in its end in a manner well known in theformation of pasted end closures. A sleeve-forming sheet 12 has appliedthereto adhesive 13 along one edge, but preferably not reaching thecorners This sheet 12 may be folded over the adhesive 13 secures thesheet in position on the corner of the bag, the adhesive reaching fromthe corner of the bag approximately 00 to slit 11 at that corner, andthe uncoated corners 14 of the sheet extending slightly beyond the slit.

Thereafter, the side of the bag 15 is spread away from the oppositeside, thereby bending the bag at the corners from the ends of slits 11to the edges of the bag along slanting lines 16 This results in'foldinginward end flap 17, as shown at the right of Fig. 4, and a similar flapat the left of that figure, to which is attached sheet 12. The foldingin of this end flap spreads the sleeve-forming sheet 12 in the mannershown in Fig. 4. It will be seen that the spread out sheet 12 then formspractically a continuation of side flap 15 which has been folded downagainst the tube and side flap 18 which remains substantially in itsoriginal position. Thereafter, adhesive may be applied at 19 along theedge of flap 18 and continuing along the edge of sheet 12. Likewise.adhesive is applied along the line 20 on end flap 17 Thereafter, aportion of flap 15 is folded upward and a portion of flap 18 is foldeddownward so that it laps over the folded-upward portion of flap 15 andthe .two flaps are adhered together by adhesive along line 19, thusforming a pasted seam 21, as indicated in Fig. 5. It will be readilyseen that the sleeve-forming sheet 12 is folded and adhered at the sametime as flaps 15 and 18 so that the two edges of the sheet are adheredalong line 22 which forms substantially a continuation of seam 21 andmakes the sheet into a sleeve extending from the valve opening betweenthe side flaps 15and 18 and the folded-in end flap. After the bag hasbeen filled through sleeve 12 the end of the sleeve may be closed in anyobvious manner, as by folding, tying, sewing. stapling or pasting.

A. sheet long enough to form two sheets 12 may be adhered to a tubebefore the tube is cut, and then the tube may be cut across the middleof the sheet so as to form two bag ends with attached sheets 12. If thisis to be done and the arrangement is to be as illustrated, slits 11 areformed in the tube before the sleeve-forming sheets are attached.

For some purposes it is desirable to use a fairly stifl sheet 12-and topre-fold or crease the sheet along fold lines. In Fig. 2 there isindicated a creased line 23, along the median line, which aids inpositioning the sheet on the tube, as shown in Fig. 2. There areindicated also creases 2&1 where the side fold lines of the finishedsleeve come, V-shaped crease 25 which aid in folding over the corners,and a crease 26 which aids in folding over and tuckin in the end of thesleeve. In order to avoid confusion, these crease lines are omitted fromthe other views, except Fig. 5, in which crease lines 25 and 26 areindicated.

If preferred, sheet 12 may be applied to the end of the bag while it isopened out ini-the position in which it isshown in Fig.2 4, in whichcase crease 23 maybe omitted. The application of sheet-12. to thetiibein the manner shown in Fig. 3 has the advantage of using crease 23 inaccurately positioning the sheet, while applying the flat sheet to theend of the bag when opened-outas in Fig. 4-, v

corner of a collapsed bag tube with sald fold has the advantage of easyapplication to well known bag-bottoming machines.

It will be seen that this invention provides a bag with a flat pastedend and with a valve having a sleeve strengthening the end of the bewhere it rests on al -filling tube during filling, and that the sleeveprovides a con-' venient means for securely closing the filling opening,and the sleeve is formed by the operation that closes the end of thebag.

The invention is'capable of various modifications within the scope ofthe appended claims. A

What I claim as new and desire to secure by Letters Patent is: v

1. A valve bag having a sleeve of comparatively stifi' paper within andprojecting from said valve, the paper of said sleeve being creased alonfold lines for folding the sleeve into valve-c osing position.

2. A bag having its end walls formed into flaps and adhered together insuperposed relation along a line to close an end of the bag, said endbeing provided with a filling valve having therein a sleeve, said sleevecomprising a sheet, one edge of the sheet being adhered to one side ofone of said flaps and the other edge being adhered to the other side ofthe same flap and the edges of the sheet being adhered together beyondsaid flaps to form a sleeve extending from said valve opening.

3. A bag having its wall at one end formed of the edge of one end flapand extending being inside of the inner one o the side flaps and theother edge of the sheet being between the two side flaps, the edges ofthe sheet being adhered together beyond the end of the side aps.

4. The method of making a bag which comprises creasin a sheet along amedian fold line, placing t e sheet on the outside of one corner of acollapsed bag tube with said line along the edge fold of the tube,adhering the sheet to the tube, and thereafter tucking in the cornerwith the sheet attached thereto to form a valve.

5. The method of making a bag, which comprises collapsing a bag-formingtube,1aflixing a sheet to the collapsed tube where a corner of a bag isto be formed, the sheet extending towards the other end of the tube fromthe line where it is afiixed to the tube, tucking end flaps and a sheetadhered to the outside in the corner and sheet to form a valve with e ithe free end of the sheet extending outward, and forming said free endinto a sleeve and at the same time closing the end of the bag except forthe opening through said sleeve.

6. The method of making albag which comprises creasing a sheet along'amedian fold line, placing the sheet on theoutside of one line along theedge fold of the tube, adhering j the edge of the sheet to the wall ofthe bag along the end'of said wall, folding in thecorner of the bag withthesheet adhered thereto, folding over one side wall of' the bag and oneedge of the sheet upori-ffth'e' folded-i11 corner and sheet, thenfoldingi over the other I 7. Thel met-hod of making a bag, whichcomprisesmc'reasing a sheet of aper along predetermined fold lines, andorming the sheet into a sleeve in a filling valve in a bag, with thefold lines in the completed sleeve so placed as to aid in folding thematerial of the sleeve to close the valve opening.

8. A bag havingits end walls formed into flaps and adhered together insuperposed re.- lation to substantially close the end of. the bag, saidend of the bag being provided with a filling valve having a sleevetherein formed from a sheet, the sheet having the'outer ends of itsopposite edges adhered together to form the outer end of the sleeve and.the inner ends of its edges adhered to opposite sides of the 1 innerone of said superposed flaps.

In testimony whereof I have hereunto signed my name to thisspecification.

JOHN C. REDINGTON.

into two end flaps and two side flaps, the end

